Patents by Inventor Andrew E. Horch

Andrew E. Horch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8853761
    Abstract: A nonvolatile memory (“NVM”) bitcell with one or more active regions capacitively coupled to the floating gate but that are separated from both the source and the drain. The inclusion of capacitors separated from the source and drain allows for improved control over the voltage of the floating gate. This in turn allows CHEI (or IHEI) to be performed with much higher efficiency than in existing bitcells, thereby the need for a charge pump to provide current to the bitcell, ultimately decreasing the total size of the bitcell. The bitcells may be constructed in pairs, further reducing the space requirements of the each bitcell, thereby mitigating the space requirements of the separate capacitor/s. The bitcell may also be operated by CHEI (or IHEI) and separately by BTBT depending upon the voltages applied at the source, drain, and capacitor/s.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: October 7, 2014
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Patent number: 8829588
    Abstract: Embodiments relate to a nonvolatile memory (“NVM”) bitcell with a replacement metal control gate and an additional floating gate. The bitcell may be created using a standard complementary metal-oxide-semiconductor manufacturing processes (“CMOS processes”) without any additional process steps, thereby reducing the cost and time associated with fabricating a semiconductor device incorporating the NVM bitcell.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: September 9, 2014
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Publication number: 20140145253
    Abstract: A nonvolatile memory (“NVM”) bitcell with one or more active regions capacitively coupled to the floating gate but that are separated from both the source and the drain. The inclusion of capacitors separated from the source and drain allows for improved control over the voltage of the floating gate. This in turn allows CHEI (or IHEI) to be performed with much higher efficiency than in existing bitcells, thereby the need for a charge pump to provide current to the bitcell, ultimately decreasing the total size of the bitcell. The bitcells may be constructed in pairs, further reducing the space requirements of the each bitcell, thereby mitigating the space requirements of the separate capacitor/s. The bitcell may also be operated by CHEI (or IHEI) and separately by BTBT depending upon the voltages applied at the source, drain, and capacitor/s.
    Type: Application
    Filed: January 29, 2014
    Publication date: May 29, 2014
    Applicant: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Patent number: 8674422
    Abstract: A nonvolatile memory (“NVM”) bitcell with one or more active regions capacitively coupled to the floating gate but that are separated from both the source and the drain. The inclusion of capacitors separated from the source and drain allows for improved control over the voltage of the floating gate. This in turn allows CHEI (or IHEI) to be performed with much higher efficiency than in existing bitcells, thereby the need for a charge pump to provide current to the bitcell, ultimately decreasing the total size of the bitcell. The bitcells may be constructed in pairs, further reducing the space requirements of the each bitcell, thereby mitigating the space requirements of the separate capacitor/s. The bitcell may also be operated by CHEI (or IHEI) and separately by BTBT depending upon the voltages applied at the source, drain, and capacitor/s.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: March 18, 2014
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Publication number: 20140056076
    Abstract: An asymmetric non-volatile memory bitcell is described. The bitcell comprises source and drain regions comprising carriers of the same conductivity type. A floating gate rests on top of the well, and extends over a channel region, and at least a portion of the source and drain regions. The drain region comprises additional carriers of a second conductivity type, allowing band to band tunneling. The source region comprises additional carriers of a first conductivity type, thereby increasing source-gate capacitance. Thus, the bitcell incorporates a select device, thereby decreasing the overall size of the bitcell. The bitcell may be created without any additional CMOS process steps, or through the addition of a single extra mask step.
    Type: Application
    Filed: November 1, 2013
    Publication date: February 27, 2014
    Applicant: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Patent number: 8630117
    Abstract: Non-volatile memory (NVM) devices are disclosed. In one aspect, a NVM device may include a substrate, and a field-effect transistor (FET). The FET may include a first doped region in the substrate and a second doped region in the substrate. The first and the second doped regions may define a channel region of the substrate between them. An insulating layer may overlie the channel region. A floating gate may overlie the insulating layer. Charge of an amount that encodes a value may be stored on the floating gate. The floating gate and the first and the second doped regions may be shaped such that the floating gate defines with the first doped region a first border of a first length, and the floating gate defines with the second doped region a second border of a second length that is less than 90% of the first length.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: January 14, 2014
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Patent number: 8598642
    Abstract: An asymmetric non-volatile memory bitcell is described. The bitcell comprises source and drain regions comprising carriers of the same conductivity type. A floating gate rests on top of the well, and extends over a channel region, and at least a portion of the source and drain regions. The drain region comprises additional carriers of a second conductivity type, allowing band to band tunneling. The source region comprises additional carriers of a first conductivity type, thereby increasing source-gate capacitance. Thus, the bitcell incorporates a select device, thereby decreasing the overall size of the bitcell. The bitcell may be created without any additional CMOS process steps, or through the addition of a single extra mask step.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: December 3, 2013
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Patent number: 8501562
    Abstract: An example of a method of fabricating a gate oxide of a floating gate transistor includes forming a plurality of shallow trench isolation (STI) regions in a silicon wafer. The method also includes selectively filling the STI regions with oxide. Further, the method includes forming sacrificial oxide regions on the silicon wafer. Furthermore, the method includes forming implant regions in the silicon wafer. In addition, the method includes selectively removing the sacrificial oxide regions. The method further includes forming the gate oxide.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: August 6, 2013
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Publication number: 20130193498
    Abstract: A nonvolatile memory (“NVM”) bitcell with one or more active regions capacitively coupled to the floating gate but that are separated from both the source and the drain. The inclusion of capacitors separated from the source and drain allows for improved control over the voltage of the floating gate. This in turn allows CHEI (or IHEI) to be performed with much higher efficiency than in existing bitcells, thereby the need for a charge pump to provide current to the bitcell, ultimately decreasing the total size of the bitcell. The bitcells may be constructed in pairs, further reducing the space requirements of the each bitcell, thereby mitigating the space requirements of the separate capacitor/s. The bitcell may also be operated by CHEI (or IHEI) and separately by BTBT depending upon the voltages applied at the source, drain, and capacitor/s.
    Type: Application
    Filed: January 30, 2012
    Publication date: August 1, 2013
    Applicant: SYNOPSYS, INC.
    Inventor: Andrew E. Horch
  • Publication number: 20130193501
    Abstract: A nonvolatile memory (“NVM”) bitcell with one or more active regions capacitively coupled to the floating gate but that are separated from both the source and the drain. The inclusion of capacitors separated from the source and drain allows for improved control over the voltage of the floating gate. This in turn allows CHEI (or IHEI) to be performed with much higher efficiency than in existing bitcells, thereby the need for a charge pump to provide current to the bitcell, ultimately decreasing the total size of the bitcell. The bitcells may be constructed in pairs, further reducing the space requirements of the each bitcell, thereby mitigating the space requirements of the separate capacitor/s. The bitcell may also be operated by CHEI (or IHEI) and separately by BTBT depending upon the voltages applied at the source, drain, and capacitor/s.
    Type: Application
    Filed: January 30, 2012
    Publication date: August 1, 2013
    Applicant: SYNOPSYS, INC.
    Inventor: Andrew E. Horch
  • Patent number: 8373167
    Abstract: Non-volatile memory (NVM) devices are disclosed. In one aspect, a NVM device may include a substrate, and a field-effect transistor (FET). The FET may include a first doped region in the substrate and a second doped region in the substrate. The first and the second doped regions may define a channel region of the substrate between them. An insulating layer may overlie the channel region. A floating gate may overlie the insulating layer. Charge of an amount that encodes a value may be stored on the floating gate. The floating gate and the first and the second doped regions may be shaped such that the floating gate defines with the first doped region a first border of a first length, and the floating gate defines with the second doped region a second border of a second length that is less than 90% of the first length.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: February 12, 2013
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Publication number: 20130026553
    Abstract: Embodiments relate to a nonvolatile memory (“NVM”) bitcell with a replacement metal control gate and an additional floating gate. The bitcell may be created using a standard complementary metal-oxide-semiconductor manufacturing processes (“CMOS processes”) without any additional process steps, thereby reducing the cost and time associated with fabricating a semiconductor device incorporating the NVM bitcell.
    Type: Application
    Filed: July 26, 2011
    Publication date: January 31, 2013
    Applicant: SYNOPSYS, INC.
    Inventor: Andrew E. Horch
  • Publication number: 20120205734
    Abstract: An asymmetric non-volatile memory bitcell is described. The bitcell comprises source and drain regions comprising carriers of the same conductivity type. A floating gate rests on top of the well, and extends over a channel region, and at least a portion of the source and drain regions. The drain region comprises additional carriers of a second conductivity type, allowing band to band tunneling. The source region comprises additional carriers of a first conductivity type, thereby increasing source-gate capacitance. Thus, the bitcell incorporates a select device, thereby decreasing the overall size of the bitcell. The bitcell may be created without any additional CMOS process steps, or through the addition of a single extra mask step.
    Type: Application
    Filed: February 14, 2011
    Publication date: August 16, 2012
    Applicant: SYNOPSYS, INC.
    Inventor: Andrew E. Horch
  • Patent number: 8194468
    Abstract: A Non-Volatile Memory (NVM) cell and programming method in which the cell can denote at least two logic levels (e.g., 0 and 1) and includes a read-transistor with a floating gate and a Band-To-Band-Tunneling device (BTBT device) sharing the floating gate with the read transistor. The BTBT device is configured as an injection device for injecting a first charge onto the floating gate when the BTBT device is biased so that it is in accumulation, to set at least one of the logic levels.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: June 5, 2012
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Publication number: 20120086068
    Abstract: A method for forming a semiconductor device and a corresponding device are provided. The method includes forming a floating gate device in a process with dual strain layers, and an etch stop layer. An oxide is formed between the floating gate device and a nitride layer above the floating gate.
    Type: Application
    Filed: October 6, 2010
    Publication date: April 12, 2012
    Applicant: SYNOPSYS INC.
    Inventor: Andrew E. Horch
  • Patent number: 8122307
    Abstract: One Time Programmable (OTP) memory structures and methods for pretesting the support circuitry are provided. A group of dedicated test cells associated with one or more groups of regular OTP cells are used to test the support circuitry for the regular OTP cells. The dedicated cells are programmed and read. The read values are compared to the programmed values or expected values. As a result of the comparison, failing memories may be designated “Not Usable”, while regular OTP cells of passing memories can be programmed for their purpose resulting in elimination of wasted memories during test.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: February 21, 2012
    Assignee: Synopsys, Inc.
    Inventors: Chad A. Lindhorst, Todd E. Humes, Andrew E. Horch, Ernest Allen, III
  • Publication number: 20110255348
    Abstract: A Non-Volatile Memory (NVM) cell and programming method in which the cell can denote at least two logic levels (e.g., 0 and 1) and includes a read-transistor with a floating gate and a Band-To-Band-Tunneling device (BTBT device) sharing the floating gate with the read transistor. The BTBT device is configured as an injection device for injecting a first charge onto the floating gate when the BTBT device is biased so that it is in accumulation, to set at least one of the logic levels.
    Type: Application
    Filed: June 10, 2011
    Publication date: October 20, 2011
    Applicant: SYNOPSYS, INC.
    Inventor: Andrew E. Horch
  • Patent number: 7983093
    Abstract: A Non-Volatile Memory (NVM) cell and programming method in which the cell can denote at least two logic levels (e.g., 0 and 1) and includes a read-transistor with a floating gate and a Band-To-Band-Tunneling device (BTBT device) sharing the floating gate with the read-transistor. The BTBT device is configured as an injection device for injecting a first charge onto the floating gate when the BTBT device is biased so that it is in accumulation, to set at least one of the logic levels.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: July 19, 2011
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Patent number: 7939861
    Abstract: Non-volatile memory (NVM) devices are disclosed. In one aspect, a NVM device may include a substrate, and a field-effect transistor (FET). The FET may include a first doped region in the substrate and a second doped region in the substrate. The first and the second doped regions may define a channel region of the substrate between them. An insulating layer may overlie the channel region. A floating gate may overlie the insulating layer. Charge of an amount that encodes a value may be stored on the floating gate. The floating gate and the first and the second doped regions may be shaped such that the floating gate defines with the first doped region a first border of a first length, and the floating gate defines with the second doped region a second border of a second length that is less than 90% of the first length.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: May 10, 2011
    Assignee: Synopsys, Inc.
    Inventor: Andrew E. Horch
  • Patent number: 7897440
    Abstract: A semiconductor device may comprise a plurality of memory cells. A memory cell may comprise a thyristor, at least a portion of which is formed in a pillar of semiconductor material. The pillar may comprise sidewalls defining a cylindrical circumference of a first diameter. In a particular embodiment, the pillars associated with the plurality of memory cells may define rows and columns of an array. In a further embodiment, a pillar may be spaced by a first distance of magnitude up to the first diameter relative to a neighboring pillar within its row. In an additional further embodiment, the pillar may be spaced by a second distance of a magnitude up to twice the first diameter, relative to a neighboring pillar within its column.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: March 1, 2011
    Assignee: T-RAM Semiconductor, Inc.
    Inventor: Andrew E. Horch